Groomer's Van
The first provably fair slot in crypto history: tumbles, free spins, a bonus buy and a 5,000x top win.
The first provably fair slot in crypto history: tumbles, free spins, a bonus buy and a 5,000x top win.
How Groomer's Van Works
Groomer's Van is the odd one out and the one that proves the point hardest. It is a full video slot, six reels and five rows, with scatter-pay wins anywhere, cascading tumbles, wilds and a free-spins bonus round. Where ordinary slots run at 94% to 97% and ask you to trust them, Groomer's Van runs at a verified 100% RTP with an edge somewhere between 0% and 0.015%.
It is the first provably fair slot ever made, which means you can audit a slot result the same way you audit a dice roll. There is a bonus buy at 125x your stake for players who want to jump straight to the feature, and the top win is capped at 5,000x. It is high variance, so sessions swing, but the long-run math is genuinely neutral.
Groomer's Van at a Glance
| Provider | Duel Originals (in-house) |
|---|---|
| Game type | Slot (6x5) |
| RTP | 100% |
| House edge | 0% - 0.015% |
| Volatility | High |
| Max win / payout | 5,000x |
| Cashback / rakeback | Slot rakeback (~50%) |
| Fairness | Provably fair (HMAC-SHA256) |
| Exclusive to | Duel.com |
How to Play
- Set your stake and spin, or buy the bonus at 125x.
- Land scatter-pay clusters; tumbles refill the grid.
- Trigger free spins for multiplier symbols.
- Verify any spin with the dual-seed system.
Pros and Cons
Pros
- First provably fair slot ever
- Verified 100% RTP
- Bonus buy at 125x
- Tumbles, wilds and free spins
Cons
- High variance
- Slot pace burns balance fast
Provably Fair
Every Duel Original, including Groomer's Van, is provably fair through a dual-seed system. Before a round, the server generates a seed, hashes it and shows you the hash. You add your own client seed, and a nonce counts each bet. Those values run through HMAC-SHA256 to produce the result, and once the round ends the server reveals the original seed so you can re-run the hash and confirm nothing changed after you bet.
You never have to trust Duel on Groomer's Van. The dual-seed commitment means the outcome is locked before your bet and revealed for verification afterwards, so the published return reflects real, checkable odds rather than a promise.
Groomer's Van FAQ
Is Duel Groomer's Van provably fair?
Yes. Groomer's Van uses Duel's dual-seed system: the server commits to a hashed seed before the round, you provide a client seed, and after the round the server seed is revealed so you can verify the result yourself with HMAC-SHA256.
What is the RTP and house edge of Groomer's Van?
Groomer's Van has a published RTP of 100% and a house edge of 0% - 0.015%. Duel earns through a per-round commission and rakeback rather than a margin baked into the game math.
How do I start playing Groomer's Van on Duel?
Open an account on Duel, fund your crypto balance, set your bet and play. There is no KYC required to start under standard conditions, and withdrawals settle in crypto within minutes.
Our Verdict on Groomer's Van
The first provably fair slot in crypto history: tumbles, free spins, a bonus buy and a 5,000x top win.
